This happens sometimes and most of the time it's from Flat BB bench press. Obviously the first time it happened you didn't give it enough rest and going up to 275lb was a bad idea. I would suggest to leave the Barbell alone and go with DB's instead using very strict and proper form. They're better for pec developement in my opinion anyway.
Also make sure you give it proper rest this time and keep a short term injury just that. If it doesn't seem to be getting better in the next week or so Iwould go see a doctor.